<?php //$$

require_once($CFG->libdir.'/formslib.php');

class recent_form extends moodleform {
	function definition() {
		global $CFG, $COURSE, $USER;

		$mform =& $this->_form;
		$context = get_context_instance(CONTEXT_COURSE, $COURSE->id);
		$modinfo = get_fast_modinfo($COURSE);

		$mform->addElement('header', 'filters', get_string('managefilters')); //TODO: add better string

		if ($COURSE->id == SITEID) {
			$viewparticipants = has_capability('moodle/site:viewparticipants', get_context_instance(CONTEXT_SYSTEM));
		} else {
			$viewparticipants = has_capability('moodle/course:viewparticipants', $context);
		}

		$viewfullnames = has_capability('moodle/site:viewfullnames', get_context_instance(CONTEXT_COURSE, $COURSE->id));

		if ($viewparticipants) {
			$options = array();
			$options[0] = get_string('allparticipants');
			if ($guest = get_guest()) {
				$options[$guest->id] = fullname($guest);
			}

			if (groups_get_course_groupmode($COURSE) == SEPARATEGROUPS) {
				$groups = groups_get_user_groups($COURSE->id);
				$groups = $groups[0];
			} else {
				$groups = '';
			}
			
			if ($courseusers = get_users_by_capability($context, 'moodle/course:view', 'u.id, u.firstname, u.lastname', 'lastname ASC, firstname DESC', '', '', $groups)) {
				foreach ($courseusers as $courseuser) {
					$options[$courseuser->id] = fullname($courseuser, $viewfullnames);
				}
			}
			$mform->addElement('select', 'user', get_string('participants'), $options);
			$mform->setAdvanced('user');
		}

		switch ($COURSE->format) {
			case 'weeks':  $sectiontitle = get_string('week'); break;
			case 'topics': $sectiontitle = get_string('topic'); break;
			default: $sectiontitle = get_string('section'); break;
		}

		$options = array(''=>get_string('allactivities'));
		$modsused = array();

		foreach($modinfo->cms as $cm) {
			if (!$cm->uservisible) {
				continue;
			}
			$modsused[$cm->modname] = true;
		}

		foreach ($modsused as $modname=>$unused) {
			$libfile = "$CFG->dirroot/mod/$modname/lib.php";
			if (!file_exists($libfile)) {
				unset($modsused[$modname]);
				continue;
			}
			include_once($libfile);
			$libfunction = $modname."_get_recent_mod_activity";
			if (!function_exists($libfunction)) {
				unset($modsused[$modname]);
				continue;
			}
			$options["mod/$modname"] = get_string('allmods', '', get_string('modulenameplural', $modname));
		}

		foreach ($modinfo->sections as $section=>$cmids) {
			$options["section/$section"] = "-- $sectiontitle $section --";
			foreach ($cmids as $cmid) {
				$cm = $modinfo->cms[$cmid];
				if (empty($modsused[$cm->modname]) or !$cm->uservisible) {
					continue;
				}
				$options[$cm->id] = format_string($cm->name);
			}
		}
		$mform->addElement('select', 'modid', get_string('activities'), $options);
		$mform->setAdvanced('modid');


		if (has_capability('moodle/site:accessallgroups', $context)) {
			if ($groups = groups_get_all_groups($COURSE->id)) {
				$options = array('0'=>get_string('allgroups'));
				foreach($groups as $group) {
					$options[$group->id] = format_string($group->name);
				}
				$mform->addElement('select', 'group', get_string('groups'), $options);
				$mform->setAdvanced('group');
			}
		} else {
			$mform->addElement('hidden','group');
			$mform->setConstants(array('group'=>0));
		}

		$options = array('default'  => get_string('bycourseorder'),
						 'dateasc'  => get_string('datemostrecentlast'),
						 'datedesc' => get_string('datemostrecentfirst'));
		$mform->addElement('select', 'sortby', get_string('sortby'), $options);
		$mform->setAdvanced('sortby');

		$mform->addElement('date_time_selector', 'date', get_string('since'), array('optional'=>true));

		$mform->addElement('hidden','id');
		$mform->setType('courseid', PARAM_INT);

		$this->add_action_buttons(false, get_string('showrecent'));
	}
}
